Flat Cable Black Handsfree Mono Headset Single Earphone Earbud Microphone for AT&T Nokia Lumia 520, AT&T Nokia Lumia 635, AT&T Nokia Lumia 820, AT&T Nokia Lumia 920, AT&T Nokia Lumia 925 FONUS(TM) Flat Cable Handsfree Mono Headset with Microphone. Premium sound and voice quality. Allows user to talk and listen to music hands free. Tangle free flat cable desing is very convenient. Excellent Bass Response. In-line microphone in ABS housing. Adopted a highly conductive gold plated 3.5mm plug. Works on any device that have a 3.5mm port. Comes with earbud cushions for a convenient fit This is a MONO headset with ONE Earbud only. - On/Off button to receive and end the call without using your phone.